[NAFEX] Apple pests
Lon J. Rombough
lonrom at hevanet.com
Wed May 5 23:56:59 EDT 2004
In this area, we would call that an "Omniverous Leaf Tier" A caterpillar
that ties the leaves together and eats nearly anything. You could use BT on
it. Most of the time here they mostly just cause a little cosmetic damage
to the leaves. They only affect the fruit where they are on a leaf touching
the fruit. Towards the end of their larval cycle they let themselves down
to the ground on a long silk line and pupate in the soil.
I was examining my apples today, and noticed that the Ashmeads Kernal
graft has a lot of little green caterpillars. They live in a curled up
leaf - the leaf stays curled up due to some strategically placed silk.
Whatever they are, they do an awful lot of damage to the growing tip.
(The leaves are not quite full sized today.)
I've had similar damage in the past, and the graft keeps growing
vigorously, although it's possible this contributes to its lack of
flowers. I think it's interesting that the crabapple this graft is
attached to gets much less damage, consistently over the years. The
other graftlings are also damaged, some much worse than the Ashmead.
Karmijn is particularly hard-hit. The Jonathan in the front yard is,
like the crab, not much affected.
Anyone know what this caterpillar is? Suggestions for control for next
year? Would dormant oil help?
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